MP5516N

MP5516N

Wide 2.6V to 16V Input Voltage, 6A, High-Efficiency Power-Loss Protection IC with Integrated E-Fuse

Description

The MP5516N is a monolithic power management system designed to manage energy storage and backup release in enterprise solid-state drives (SSDs). It consists of a current-limited, reverse-current protected input power switch (E-fuse), an autonomous buck-boost energy storage and release converter, and storage capacitance health monitoring. The configurable storage voltage, backup release, and system output bus voltages enable flexible design. An onboard analog-to-digital converter (ADC) provides real-time monitoring for many power system parameters via the I²C.

The input switch's configurable current limit helps to limit inrush current during system start-up. The reverse current blocking prevents backup energy from flowing to a failing input source. The energy storage/release converter's switching frequency (f_SW) and charging current can be configured to allow for optimal external component values and size trade-offs in design. The energy release transition is controlled by an internal logic for seamless transition. A constant-on-time (COT) control buck topology ensures steady regulation during energy release. The buck-boost energy storage/release converter only requires a single inductor to operate.

Onboard multiple-time programmable (MTP) memory allows system operating parameters to be specifically stored to a given product assembly, such as the input current limit, capacitor health check start and stop values, and discharge current. These parameters can be adjusted in system via the I²C interface. The onboard, 8-bit ADC can be used to monitor the input voltage (V_IN) and input current (I_IN) in real time.

The MP5516N requires a minimal number of readily available, standard external components, and it is available in a QFN-25 (4mmx4mm) package.

Features & Benefits

Input Current Limit Switch:
- Wide 2.6V to 16V Input Voltage (V_IN)
- 20mΩ On Resistance (R_DS(ON)) Switch for E-Fuse
- 1.2A to 6A Configurable Input Current (I_IN) Limit
- 3.3V, 5V, and 12V Selectable Under-Voltage Lockout (UVLO) and Over-Voltage Protection (OVP)
- Reverse Blocking at the Input Side to Prevent Current Leakage
- Configurable Soft-Start Time (t_SS)
- Configurable Turn-On Delay Time

36V Charge and Backup Converter:

Up to 36V Configurable Storage Voltage
60mΩ/37mΩ R_DS(ON) for High-/Low-Side Switches
Configurable Boost Charging Current
Boost Charge Mode and Buck Release Mode Auto-Alternating According to the Configurable System Voltage Regulation Level
Constant-On-Time (COT) Control for Steady-State Operation in Buck Release Mode with Configurable Switching Frequency (f_SW)
5A Valley Current Limit during Buck Release
Short-Circuit Protection (SCP) at Both the Load Side and Energy Storage Side
Storage Capacitance Detection